CD274 and diffuse large B-cell lymphoma: Arm A1 (cHL anti-PD-1/PD-L1 naïve): Isatuximab + Cemiplimab + RadiotherapyArm A2 (cHL anti-PD-1/PD-L1 progressors): Isatuximab + Cemiplimab + RadiotherapyArm B (DLBCL): Isatuximab + CemiplimabArm C (PTCL): Isatuximab + Cemiplimab